HomeMy WebLinkAbout2025 City Specs & Engineering Stds
STANDARD SPECIFICATIONS &
ENGINEERING STANDARDS
DECEMBER 2025
PUBLIC WORKS DEPARTMENT
ENGINEERING DIVISION
919 Palm Street
San Luis Obispo, CA 93401
(805) 781-7200
GENERAL NOTES:
A. City Utilities Department will install all new and replacement wyes on existing sewer mainlines. Notify city inspector 48 hour prior to all
planned sewer lateral installations or replacements. Provide a minimum five-foot by five-foot excavation with OSHA approved shoring
and ladder. When a sewer mainline is not in good structural condition after the removal of existing wye, the contractor shall expose the
city mainline until they locate sound pipe.
B. Sewer lateral repair must comply with section 77-3.03F(3) of the Standard Specifications.
C. Install backwater trap or backwater valve in compliance with municipal code section 13.08.390.
INSTALLATION NOTES:
1 Factory-fabricated wye in sewer main, with 1/8 bend. Bend shall point downstream and enter main at a vertical angle of not less than 5°
or more than 45°.
2 Sewer lateral pipe and fittings must comply with sections 77-3.02A(5) and 77-3.02B(5) of the Standard Specifications.
3 Top of curb shall be marked with an "S" directly over lateral. The "S" shall be stamped in new concrete or chiseled into existing concrete
and shall not be less than 3" long, 2" wide and 3 16" deep.
4 When non-metallic pipe is used, magnetic tracer tape must be placed in trench over lateral from sewer main to cleanout at a depth of 12".
5 Depth of lateral must not be less than 3' or greater than 5' deep from top of pipe to finished surface unless alternate stronger pipe material
is used.
6 Refer to Engineering Standards 6110 and 6140 for separation requirements with waterlines.
7 A cleanout shall be installed if called for on the plans or for new laterals where the distance between the right-of-way and the building is
greater than 100' or where no cleanout exists at the building. The cleanout shall consist of one-way cleanout wye, riser, and cleanout
fitting with plug. Tee shall be plugged at night during construction and left plugged when backfilled if not tied to user. Cleanouts must be
placed outside of City right of way.
THIS STANDARD APPLIES TO NEW AND MODIFIED LATERALS. THE ABOVE REQUIREMENTS MAY BE MODIFIED OR WAIVED
ONLY WITH THE APPROVAL OF THE CITY UTILITIES DEPARTMENT.
1
3
7
4 S5
6
SEWER
MAIN
WATER
MAIN
SEWER
MAIN
GUTTER
SIDEWALK
PLAN VIEW
SECTION
to bldg.
2
3
2
1
712"5
5° - 45°
SEWER LATERAL
6810
Revise all notes MH BL 1-14
add backflow KH BN 6-24
Tracer tape depth JDL MH 9-12
REVISIONS BY APP DATE
STANDARD CURRENT AS OF:NOV 2025
REVISIONS BY APP DATE
STANDARD CURRENT AS OF:
Backwater valve
See note C.
DEC 2025